Question

Arrange the correct order of P-V diagrams in thermodynamics for an isothermal process, isobaric process, isochoric process and adiabatic process

• A. a,b,c,d
• B. a,c,b,d
• C. d,c,b,a
• D. d,b,c,a

Hint:

Identify each graph by its shape: horizontal line is isobaric, vertical line is isochoric, and the steeper curve is adiabatic.

Answer 1

The Correct Option is A

Step 1: Shape Check for Straight Lines
Constant pressure gives a line parallel to the V-axis (b). Constant volume gives a line parallel to the P-axis (c).

Step 2: Compare the Two Curves
Slope of the isothermal curve is $-\dfrac{P}{V}$, while for the adiabatic curve it is $-\gamma\dfrac{P}{V}$, which is steeper.

Step 3: Compare the options
So isothermal = a, isobaric = b, isochoric = c, adiabatic = d, which is the first option.

Final Answer:
The sequence matching the graphs is a, b, c, d. \[ \boxed{\text{(A) }a,b,c,d} \]